# Revisions to the California State Implementation Plan, South Coast Air Quality Management District
> **Rule** · Final rule. · Published 2004-07-26 · Effective 2004-08-25 · 69 FR 44461
## Document
- **Document number:** 04-16942
- **Category:** air-emissions
- **Federal Register citation:** 69 FR 44461
- **CFR reference:** 40 CFR 52
- **Publication date:** 2004-07-26
- **Effective date:** 2004-08-25
- **State:** CA
- **EPA docket:** CA302-0463
## Abstract

EPA is finalizing approval of revisions to the South Coast Air Quality Management District portion of the California State Implementation Plan (SIP). These revisions were proposed in the Federal Register on May 21, 2004, and concern oxides of nitrogen (NO<INF>X</INF>) and oxides of sulfur (SO<INF>X</INF>) emissions from facilities emitting 4 tons or more per year of NO<INF>X</INF> and/or SO<INF>X</INF> in the year 1990 or any subsequent year. We are approving local rules that regulate these emission sources under the Clean Air Act as amended in 1990 (CAA or the Act).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2004/07/26/04-16942/revisions-to-the-california-state-implementation-plan-south-coast-air-quality-management-district)
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